final public static Database::setMultipleConnectionInfo(array $databases)

public Connection::createDatabase($database)

public static Connection::sqlFunctionSubstringIndex($string

public SelectExtender::escapeField($string)

protected Tasks::connect() Check

public Connection::query($query, array $args = array(), $options

General class for an abstracted "Upsert" (UPDATE or INSERT) query operation. This class can only be used with a table with a single unique index

public Schema::dropUniqueKey($table, $name)

public Connection::queryRange($query, $from, $count, array $args

Query extender class for tablesort queries. Hierarchy class \Drupal\Core\Database\Query\